这是我的问题,我有主视图,只显示一个按钮,按这个按钮,另一个视图显示。此视图只有另一个按钮,当按下此按钮时,当前视图完成,控件返回到上一个视图。
为了显示我使用StartActivityForResult的第二个视图,我将代码放在这里。

private void startNewview() {
    Intent it = new Intent(getApplicationContext(), newView.class);
    startActivityForResult(it,VIEW_ID);

}

调用的视图只有一个按钮事件,这是代码
Button b = (Button) findViewById(R.id.close);
    b.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
            setResult(RESULT_OK);
            finish();

        }
    });

最后,方法onActivityResult在主视图中,这里是代码
protected void onActivityResult(int requestCode, int resultCode, Intent data) {

    super.onActivityResult(requestCode, resultCode, data);
    if(requestCode == VIEW_ID && resultCode == RESULT_OK) {
        tv = (TextView) findViewById(R.id.tv);
        tv.setText("The result ok is  here :)");
    }

}

问题是resultcode总是0=result_被取消,我不知道怎么解决,有人能帮我吗?
非常感谢!

最佳答案

我无法解释您的代码中发生了什么,但我有一个项目示例来做这个。
仅使用按钮btnfoo的fooActivity:

@Override
protected void onStart() {
    super.onStart();

    btnFoo.setOnClickListener( new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            startActivityForResult(new Intent("xper.activity.ACTIVITY_BAR_INTENT"),1);
        }
    });
}

在androidmanifest.xml中添加了一个barActivity,如下所示:
<activity
    android:name = "BarActivity">
    <intent-filter>
        <action
            android:name = "xper.activity.ACTIVITY_BAR_INTENT"/>
        <category
            android:name = "android.intent.category.DEFAULT"/>
    </intent-filter>
</activity>

检索条内意图的相应代码位于btnbar(按钮)的onclevent中:
@Override
protected void onStart() {
    super.onStart();

    btnBar.setOnClickListener( new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            Intent intent = new Intent("xper.activity.ACTIVITY_BAR_RESULT_INTENT");
            intent.putExtra("codBar", "bar");
            setResult(Activity.RESULT_OK, intent);
            finish();

        }
    });
}

现在,如果你没有很好地处理OnActivityResult()事件,当你按下Android按钮“后退”时,你会得到错误。
如果活动B中的意图(意图)是向活动A提供一些信息,如果您按后退按钮,我不知道活动B是否将在堆栈中,但意图没有完成。所以我做了以下工作:
@Override
public void onBackPressed() {
    // TODO Auto-generated method stub
    super.onBackPressed();

    //Intent intent = new Intent("xper.activity.ACTIVITY_BAR_RESULT_INTENT");
    //intent.putExtra("codBar", "bar");
    //setResult(Activity.RESULT_CANCELED, intent);
    setResult(Activity.RESULT_CANCELED);
    finish();
}

在事件onActivityResult()中处理信息时,我执行了以下操作,以查看在BAR活动中检索到的信息:
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if(data != null) {
        Toast.makeText(this, "BAR\trequestCode == " + requestCode + "\tresultCode  == " + resultCode + "\tdata == " + data, 10000).show();
        btnFoo.setText("BAR\trequestCode == " + requestCode + "\tresultCode  == " + resultCode + "\tdata == " + data /*+ "extras == " + data.getExtras().getString("codBar")*/);
    } else {
        Toast.makeText(this, "BAR\trequestCode == " + requestCode + "\tresultCode  == " + resultCode, 10000).show();
        btnFoo.setText("BAR\trequestCode == " + requestCode + "\tresultCode  == " + resultCode);
    }

}

如果您有更多的活动要将信息返回给父活动,那么请执行以下操作:
//put private static final int globals atributes with the respective name of the
//activity to represent the requestCode for each activity you have like:
private static final int ACTIVITY1 = 117;
private static final int ACTIVITY2 = 118;
...
private static final int ACTIVITYN = 215;

//In the event onActivityResult() is better use the switch statement to handle each
//specific activity to catch information
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    if(resultCode == Activity.RESULT_CANCELED) return; // breaks
    //if you decide to handle some information of Activity.RESULT_CANCELED
    //ignore the above condition that returns and handle it inside the switch statement

    switch(requestCode) {
    case ACTIVITY1:
    {
        //Dosomething
    } break;
    case ACTIVITY2:
    {
        //Dosomething
    } break;
    ...
    case ACTIVITYN:
    {
        //Dosomething
    } break;
    }
}

如果不能执行此示例代码…
请给我你的电子邮件给我发一个FOOBactivity项目

07-24 09:47
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